diff --git a/README.md b/README.md
index 827c11f..549f33a 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ For more information, please refer to the following documents, [Samples](Assets/
 ### Requirements
 This library is compatible with the following environments.
 
-* Unity 2020.3 or higher
+* Unity 2021.3 or higher
 * Universal Render Pipeline
 * Shader Model 3.5
 
diff --git a/README_JA.md b/README_JA.md
index 1f944b6..1013d5f 100644
--- a/README_JA.md
+++ b/README_JA.md
@@ -87,7 +87,7 @@
 #### 要件
 本ライブラリは以下の環境に対応しています。
 
-* Unity 2020.3 以上
+* Unity 2021.3 以上
 * Universal Render Pipeline
 * Shader Model 3.5